reddit.inbox.message() redirected to /login/ endpoint.

### Describe the Bug While trying to access `.inbox.message` and `.inbox.messages` I get a 302 error and the response contains a redirect to a login endpoint. ### Desired Result Functions return message object(s). ### Code to reproduce the bug ```Python reddit = praw.Reddit( client_id='', client_secret='', username='', password='', user_agent='', ratelimit_seconds=300 ) reddit.read_only=True for message in reddit.inbox.messages(): print(message) ``` ### My code does not include sensitive credentials - [x] Yes, I have removed sensitive credentials from my code. ### Relevant Logs ```Shell prawcore.exceptions.Redirect: Redirect to /login/ (You may be trying to perform a non-read-only action via a read-only instance.) ``` ### This code has previously worked as intended Yes ### Operating System/Environment macOS Sequoia 15.4.1 ### Python Version 3.12 ### PRAW Version 7.8.1 ### Links, references, and/or additional comments? _No response_